In-buffer completion of BBDB mail addresses with corfu

[Arash Esbati <arash@gnu.org>]

Hi all,

I'm playing with corfu instead of company-mode and it occurred to me
that I don't get any in-buffer completion in 'To' field when I hit TAB
from my BBDB database.  I looked at message.el and it seems to have some
functions to this purpose (message-completion-function, message-tab,
message-expand-name, ...) but it doesn't work for me.

This is the value of `completion-at-point-functions' for me while
writing this message.

,----
| completion-at-point-functions is a variable defined in ‘minibuffer.el’.
| 
| Its value is
| (eudc-capf-complete message-completion-function t)
| Local in buffer *unsent mail*; global value is 
| (tags-completion-at-point-function)
`----

Before adding something like this to my .gnus:

  (add-hook 'message-mode-hook
            (lambda ()
              (add-to-list 'completion-at-point-functions
                           (cape-company-to-capf 'company-bbdb))))

Does message.el has a prefabbed Capf for BBDB or any other trick to make
this work?

Best, Arash